In southern Michigan, elevated radon is common. According to the data shown on the map, counties like Jackson, Hillsdale, and Lenawee fall into the highest‑risk category, where roughly 1 in 2 homes test at or above the EPA action level of 4.0 pCi/L. Because radon is invisible, odorless, and impossible to detect without proper testing, every home in these counties should be tested during a real estate transaction or as part of routine safety checks. Our radon testing service provides accurate, certified results so you can protect your home and your family with confidence.